说明： 讲述PC的原理技术，包括cpu与内幕指令、系统与设备检测、适配卡开发，bios数据、cmos与时钟、DMA服务等 (on the principle of PC technologies, including the cpu with insider instructions, systems and equipment for testing, the development of an adapter card, BIOS data, and the CMOS clock, DMA services)
